depends what you are looking for in your server
DSY= humeffect, horses, extra mon and object wils and extra NPC commands+ al the normal rebirth and stuff
DEADSONS= well we all know whats in that
NORMAL= just the first M2 we ever got
then there is 2 or 3 different M2server.exe out there
1 with 2-3 new spells
1 with 6 new spells
some with para weapons
man china have got to stop making different m2s and just make a mir1.9 server :P